package cn.wzby;

public class Sbd {
    public static void main(String[] args) {
        //StringBuilder构造方法
        StringBuilder a1 = new StringBuilder();
        a1.append("www");
        StringBuilder a2 = new StringBuilder();
        a2.append("zzz");
        StringBuilder a3 = new StringBuilder();
        a3.append("yyy");
        a3.append("java");
        System.out.println(a1);
        System.out.println(a2);
        System.out.println(a3);
    }
}
